Steam-shovel dipper.



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. STEAM SHOVEL DIFFER.

APPLICATION FILED APR.241916.

Patented Feb.. 6, 1917.

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WILLIAM Gr. WOOD, OF SACRAMENTO, CALIFORNIA, ASSIGNOR OF ONE-HALF TO FRANK B. MCKEVITT, OF SACRAMENTO, CALIFORNIA.

STEAM-SHOVEL DIPPER.

The object of the present invention is to l avoid the loss of time often occasioned in ejecting the load from dippers of the present construction used in steam shovels.

In the accompanying drawing, Figure 1 is a side view of a dipper, and parts of the dipper handle constructed in accordance with my invention; Fig. 2 is a rear view thereof; Fig. 3 1s a broken rear View of a l modified form of the invention.

Referring to the drawing, 1 indicates a dipper secured to a dipper handle 2 by means of a pivot 3 and links 4 connected to the dipper and dipper handle. 6 indicates the bail of the dipper by which it is elevated, and 7 indicates the bars pivoted upon the back of the dipper, and controlling the dipper door. i

I make no change in these parts except that on the backs of the bars 7 I form apertnred lugs 8. These lugs 8 are pivotally connected to bars 9 which are also pivotally connected to arms 11 secured to, and extending rearwardly from, a shaft 12 mounted in standards 13 erected from the top of the back of the dipper, to which shaft are secured arms 14, which, in the normal position of the dipper, when its bottom is closed, are directed vertically.

In the form, of the invention shown in Specication of Letters Patent.

Application filed April 24, 1916.

vPatented Feb. 6, 19117,

Serial No. 93,155.

Figs. 1 and 2, these arms 14 terminatein picks or hammers 15, which, when the door of the dipper is opened in the usual manner, impinge upon the top of the material in the dipper and loosen the same and assist the material in falling from the dipper.

To obtain the same result, the arms 14 are, in the form of the invention shown in Fig. 3, connected by a cross bar 16 of considerable weight, which, when the bottom of the dipper is opened, strikes the heaped material a heavy blow.

The arms 14 and the picks.15 or bar 16 are counterbalanced, as shown at 17, to assist in bringing the bottom of the bucket back to a closed position.

I claim 1. In combination with the movable bottom of the dipper of a steam shovel, means y arranged to impinge downwardly upon the material heaped in the top of the dipper, an operative connection between said bottom and means whereby, when said bottom opens, said means so impinges.

- 2. In combination with a dipper of a steam shovel or the like having a movable bottom, a (levicc pivotally connected to Said dipper and arranged in its pivotal movement to impingc upon the material heaped in the top of thc dipper, an arm extending from said device, and a bar pivotally connected to said arm and operatively connected to the bottom of the dipper, whereby, when said bottom opens, said device descends upon the material in the top of the dipper.

'WILLIAM G. WOOD. 

